Alert archive / Maryland / Flash Flood Warnings in 2023

Flash Flood Warning 53, NWS Wakefield, VA

August 7, 2023Wicomico County, Maryland

NWS Wakefield, VA issued this flash flood warning at Aug 7, 2023, 9:58 PM EDT for Wicomico County, Maryland. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 7, 2023, 9:58 PM EDT (01:58 UTC)
Expired
Aug 8, 2023, 1:00 AM EDT
In force
3 hr
Issued by
NWS Wakefield, VA
Area
Storm-based polygon
Flood severity
None

County Wicomico County, MD

The radar

The Dover AFB radar (KDOX), 53 km from the middle of the area, began a volume at 02:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.0 hours before the alert went out and 53 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2023-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1636 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2023-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1636 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
791 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
1.3
Supercell composite
6.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wakefield, VA wrote its last area forecast discussion before this flash flood warning went out at Aug 7, 8:29 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, Aug 7, 8:29 PM EDT, 1 hour 29 minutes before
AREA FORECAST DISCUSSION
National Weather Service Wakefield VA
829 PM EDT Mon Aug 7 2023

.SYNOPSIS...
A cold front will approach the area from the west this evening,
resulting in increased chances for showers and thunderstorms,
some of which may be severe. Seasonable weather expected for the
remainder of the week.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
As of 825 PM EDT Monday...

Added Severe T-Storm Watch 611 for NE NC counties until 11 pm,
as southern shortwave crosses the Carolinas.

Area continues to be split by shortwaves, which has served to
enhance convective inhibition over central and southern portions
of the area. This was accounted for in lower PoPs over southern
half of the area, but it seems to be verifying to a stronger
degree than previously modeled.

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY NIGHT/...
As of 245 PM EDT Monday...

Cooler, drier air pushes into the region post-frontal Tuesday on
breezy NW winds. Winds will gust to 20-30 mph late Tue morning
into the afternoon, highest along the coast. Dewpoints look to
drop into the upper 50s to ~60 across the piedmont into RIC
metro area. Closer to the coast, dewpoints will likely stay in
the mid-60s. Highs will be in the 80s inland and the low 90s
across the SE coast.

Remaining dry and seasonable across the area on Wednesday. After
lows in the 60s on Tuesday night, look for highs in the upper 80s to
near 90 on Wednesday. Dewpoints will continue to be relatively
pleasant in the low-mid 60s. Skies will still be mostly sunny. Lows
will again be in the 60s Wednesday night.

&&

.LONG TERM /THURSDAY THROUGH MONDAY/...
As of 245 PM EDT Monday...

Rain chances return to the forecast on Thursday, with the east coast
trough rebuilding by late week. As the trough axis swings east,
the lead shortwave pivots across the area. Meanwhile, low-level
flow will nudge the stationary frontal boundary back northward
later Thursday into Friday, further enhancing llvl moisture. CMC
is a fast outlier with this system, with the vast majority of
guidance later. Therefore nudged increasing PoPs a bit later
into Thursday afternoon and evening over the local area.

For Friday and the weekend, there will be diurnal chances
for a few showers/storms. For now, keeping PoPs limited to the 15-
30% range. Highs will generally be in the upper 80s to low 90s
Thurs- Sun. Lows in the upper 60s to low 70s.

&&

.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
As of 825 PM EDT Monday...

VFR conditions in place over area terminals to begin the TAF
period. Showers and thunderstorms have split local terminals,
mainly north and south of the area. Still expect SBY will be
impacted by sub-VFR conditions between 01-05z (9 pm-1 am),
and ECG could see brief sub-VFR conditions between 02-04z
(10p-midnight). Gusty winds and IFR VIS with reduced CIGs will
be possible with any storms. Storms move offshore late tonight.
SSW winds turn NNW late tonight.

Outlook: Predominantly VFR conditions Tues and Wed with gusty W
winds 15-17 kt with gusts 20-25 kt Tuesday afternoon behind the
cold front.

&&

.MARINE...
As of 400 PM EDT Monday...

Late this aftn, a sfc trough was setting up over the VA
Piedmont, while a cold front was pushing through ESE Ohio and
ern KY. Winds were mainly SSE 10-20 kt over the waters. Waves
were 1-3 ft and seas were 2-3 ft. Low pressure and the associated
cold front push E this evening. A SSE wind of 10-15 kt will
continue, with gusts to ~20 kt. Strong to severe tstms will
develop ahead of the cold front during this evening. No flags
will be issued at this time given that the wind outside of tstms
should primarily be sub-SCA. However, SMWs are likely with any
tstms this evening.

The cold front pushes through the area later tonight into Tue
morning. The wind is expected to become WSW 10-15 kt with gusts
to 20 kt late tonight, and then W/WNW Tue morning. A brief period
of SCA conditions are possible for the Bay late tonight/early
Tue morning, as drier air arrives into the region. The wind
becomes NW 5-10 kt S to 10-15 kt N by early Wed morning. Seas
build to 3-4ft tonight, then 2-3 ft S to 3-4 ft N Tue, with
waves in the Bay ~2 ft and occasionally up to 3 ft. Seas subside
to 2-3 ft by Wed, as the wind diminishes and shifts from W to
SSE. A SSW wind of 10-15 kt returns Thu, and then shifts to W
and diminishes Fri behind a weak cold front. Seas potentially
build to 3-4 ft later Thu/Thu night, and then subside to 2-3 ft
by Fri.

&&

.AKQ WATCHES/WARNINGS/ADVISORIES...
MD...None.
NC...None.
VA...None.
MARINE...None.

&&

SYNOPSIS...MAM
NEAR TERM...MAM
SHORT TERM...AM/MAM
LONG TERM...AM/MAM
AVIATION...MAM
MARINE...AJZ/TMG
Hazardous weather outlook, Aug 7, 8:16 PM EDT, 1 hour 42 minutes before
Hazardous Weather Outlook
National Weather Service Wakefield VA
816 PM EDT Mon Aug 7 2023

NCZ012-VAZ065-066-079>084-086>090-092-093-095>100-523>525-090030-
Northampton-Mecklenburg-Lunenburg-Brunswick-Dinwiddie-Prince George-
Charles City-New Kent-Gloucester-Mathews-Greensville-Sussex-Surry-
James City-Southampton-Isle of Wight-Norfolk/Portsmouth-Suffolk-
Chesapeake-Virginia Beach-Accomack-York-Newport News-
Hampton/Poquoson-
816 PM EDT Mon Aug 7 2023

This Hazardous Weather Outlook is for northeast North Carolina,
east central Virginia, eastern Virginia, south central Virginia and
southeast Virginia.

.DAY ONE...Tonight.

Isolated thunderstorms are possible this evening. Some of the storms
may produce strong gusty winds...small hail...and heavy downpours.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

NCZ013>017-030>032-102-090030-
Hertford-Gates-Pasquotank-Camden-Western Currituck-Bertie-Chowan-
Perquimans-Eastern Currituck-
816 PM EDT Mon Aug 7 2023

...SEVERE THUNDERSTORM WATCH 611 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for northeast North Carolina.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MDZ021>025-VAZ048-060>062-064-067>069-075>078-085-509>522-090030-
Dorchester-Wicomico-Somerset-Inland Worcester-Maryland Beaches-
Fluvanna-Prince Edward-Cumberland-Goochland-Caroline-Nottoway-Amelia-
Powhatan-Westmoreland-Richmond-Northumberland-Lancaster-Middlesex-
Western Louisa-Eastern Louisa-Western Hanover-Eastern Hanover-
Western Chesterfield-Eastern Chesterfield (Including Col. Heights)-
Western Henrico (Including the City of Richmond)-Eastern Henrico-
Western King William-Eastern King William-Western King and Queen-
Eastern King and Queen-Western Essex-Eastern Essex-
816 PM EDT Mon Aug 7 2023

...TORNADO WATCH 602 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for southeast Maryland, central
Virginia, east central Virginia, eastern Virginia, north central
Virginia and south central Virginia.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

05

In the hours before

Local storm report, Aug 7, 9:08 PM EDT, 50 minutes before
Preliminary Local Storm Report
National Weather Service Wakefield VA
908 PM EDT Mon Aug 7 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 PM     Tstm Wnd Dmg     4 NNE Waldrop           38.13N 78.19W
08/07/2023                   Louisa             VA   911 Call Center

            One tree and several large tree limbs downed
            along US-15 between Waldrop and
            Gordonsville.

&&

05
Local storm report, Aug 7, 9:11 PM EDT, 47 minutes before
Preliminary Local Storm Report
National Weather Service Wakefield VA
911 PM EDT Mon Aug 7 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0610 PM     Hail             1 NNW Fort A.p. Hill    38.12N 77.27W
08/07/2023  E1.75 inch       Caroline           VA   Trained Spotter

            Golf ball sized hail reported near Fort AP
            Hill.

&&

05
Local storm report, Aug 7, 9:12 PM EDT, 46 minutes before
Preliminary Local Storm Report
National Weather Service Wakefield VA
912 PM EDT Mon Aug 7 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0640 PM     Hail             1 NNW Fort A.p. Hill    38.12N 77.27W
08/07/2023  E1.75 inch       Caroline           VA   Trained Spotter

            Corrects previous hail report from 1 NNW
            Fort A.p. Hill. Golf ball sized hail
            reported near Fort AP Hill.

&&

05
Local storm report, Aug 7, 9:31 PM EDT, 27 minutes before
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Local storm report, Aug 7, 9:35 PM EDT, 23 minutes before
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Local storm report, Aug 7, 9:45 PM EDT, 13 minutes before
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The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 7, 8:29 PM EDTSevere Thunderstorm WarningAKQGreensville, Southampton, City of Suffolk61 min
Aug 7, 10:42 PM EDTSpecial Marine WarningAKQ93 min
Aug 8, 12:12 AM EDTSmall Craft AdvisoryAKQ10 hr
Aug 7, 8:53 PM EDTFlash Flood WarningAKQDorchester3 hr
Aug 7, 8:59 PM EDTSevere Thunderstorm WarningAKQDorchester, Somerset, Wicomico46 min
Aug 7, 9:21 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatAKQDorchester3 hr
Aug 7, 9:42 PM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester48 min
Aug 7, 10:06 PM EDTSpecial Weather StatementAKQWicomico39 min
Aug 7, 10:17 PM EDTTornado WarningAKQSomerset, Wicomico, Worcester28 min
Aug 7, 10:27 PM EDTSevere Thunderstorm WarningAKQWicomico, Worcester48 min
Aug 7, 10:44 PM EDTTornado WarningAKQWorcester31 min
Aug 7, 10:45 PM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester45 min
Aug 7, 11:22 PM EDTSpecial Weather StatementAKQWorcester23 min
Aug 7, 11:26 PM EDTSevere Thunderstorm WarningAKQWorcester26 min
Aug 8, 12:12 AM EDTAreal Flood WarningAKQDorchester6 hr

Nearby

Flash Flood Warnings in Maryland, 2023Every flash flood warning in 2023

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.